Pipe fitting



PIPE FITTING Filed March 25, 1931 2 sheets-sheet 2 lNvENToR ,yB/YM 5? ATTORNEY Patented Sept. 451934l wam PIPE FITTING Fna c. mmvwemuom, un.. um a Midwest Piping a Suppl! Co. Ine., St. Luis. Mo., a corporation of Mineur! Application March 25, 1931, No. 525,182

l Claim. (Cl. 137-75) My invention consists of apipe iltting designed more especially for highpressure work, although it will be apparent from the hereinaftercontairied description that it may be used for any pipe b line where ilttings are required.

My invention has for its object to produce a pipe fitting formed from metal plate which has an excess of metal above the ultimate thickness oi' the walls of the nished tting.

My means of producing said new article of manufacture is clearly shown in the accompanying drawings in which- 1 isa View of a finished tting;

giF'i'g. 2 is a transverse sectional elevation of dies l used in forming a tting by my improved process: Fig. 3 is a similar view showing the dies closed;

Fig. 4 is a transverse sectional elevation of theI dies for the next step of the process, the dies being in the open position which they occupy at the' beginning of the operation of closing the fitting formed bythe dies shown in Figs. 2 and 3.

Fig. 5 is a similar view showing the dies cloeed;'

Fig. 6 is a top or plan view of the lower dies showing the form of mandrel used, the fitting being shown in section; and

Fig. 'l is a top or plan view of the nishing dies, the iitting and mandrel being shown in dotted lines.

Similar reference numerals refer to similar parts throughout the entire description.

In the drawings I have shown a series of dies for forming the new article of manufacture. A blank, formed of metal of the desired'conilgurationjs placed between the plunger die, and a low- 35, er die, the male portion of'the plunger and the female portion of the lower die being arcuately concave both longitudinally and in cross section where an elbow is to be formed. When these dies are brought together the blank 3 is formed into a 'U-shaped piece 6, the sides of which by this operation, are considerably upset. The U-shaped piece is then mounted upon a mandrel and placed horizontally between upper and lower dies having concave portions of the desired configuration as shown in Figs. 4 to 6 inclusive. When these dies are brought together, the result is that the sides o5 of the U-shaped member are formed inwardly until their edges abut. The mandrel is then removed and the edges are welded. The iltting is then reheated and a finishing mandrel of the exact size desired may, if desired, be inserted in 7o the fitting and it is then compressed between this finishing mandrel and a pair of dies of the exact lsize of the iltting desired. The mandrel may be omitted and the iltting produced by compression between the dies. 'Ihus I am able to produce a 75 ntting, the walls of which will be of uniform thickness throughout their entire area and also of greater density than the metal of which the blank is made.

Having described my invention what I regard as new and desire to secure by Letters Patent of Athe United States is:

A new article of manufacture comprising a pipe iltting formed from an excess of metal above that required where the metal is stretched in the 5 formation of the iitting, the nished iltting having a welded seam, metal uniformly thick and uniformly dense, the density being greater than that of the original material.

man c. nmz.

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